ABSTRACT
The problem presented was to produce a large number of fixtures for PAR-36-size ACL (aircraft landing) lamps. The fixtures would need to be focusable along both the horizontal and vertical axes. They should be durable, functional, inexpensive, easy to make, and should not look shop-built. They were to be mounted on an octagonal lighting truss made of welded square tube, and wired in series in groups of four to maintain the proper voltage.
